Structure of handgrip and method for fabrication the same

ABSTRACT

New form of handgrip for various home appliances, and method for fabricating the same, including a core  2  with decorative color, and a transparent outer shell  3  for enclosing the core  2,  thereby solving problems of the present handgrip of peeling off of coating, and damage to carved, or relieved figures, or characters, and providing an outer look distinctive from the present handgrip.

TECHNICAL FIELD

[0001] The present invention relates to a structure of a handgripapplicable to various home appliances and a method for fabricating thesame, and more particularly, to a structure of a handgrip applicable tovarious home appliances, such as laundry, refrigerator, microwave rangeand so on, and door of vehicle, etc., and a method for fabricating thesame.

BACKGROUND ART

[0002]FIG. 1 is an exemplary view of a conventional handgrip that ismainly applied to door or cover of home appliances. In order tofabricate the conventional handgrip, a mold having a desiredhandgrip-shaped cavity is fabricated and resin is then injected into thecavity to form a handgrip. After that, the formed handgrip la is subjectto a coating treatment of the surface thereof for the purpose of highgrade of its external appearance.

[0003] Meanwhile, in recent years, in addition to the function of aproduct, the sense of beauty in external appearance has settled down asa very important element for market demand of products. Accordingly,product manufacturers pay their special endeavors to the enhancement ofwhole or partial sense of beauty.

[0004] In the light of this trend, the handgrip applied to various homeappliances is also fabricated in various forms considering whole senseof beauty of product along with functional aspect, but the conventionalhandgrip structure and the manufacturing method thereof does not advancethe function and sense of beauty of the handgrip in a remarkable formanymore. In other words, the handgrip la fabricated by the conventionalmethod is generally coating-treated through a spraying method onto thesurface thereof, which may cause a problem in that the coated film peelsoff due to its repeated usage by user or is decolored after usage of itslong term to impede the sense of beauty.

[0005] In particular, the conventional handgrip has a drawback in thatits painted surface is very weak to contact with chemicals, such ascosmetics and so on.

[0006] Meanwhile, in case character or figure is carved or relieved onthe surface of the handgrip la, there may occur a disadvantage in thatthe surface is worn due to contact and collision with other articlescaused by a long term usage, so that character or figure loses itsoriginal shape.

[0007] In other words, in case of being carved, foreign particles aresmeared in grooves of the surface, whereas in case of being relieved,fracture or friction of the surface may occur due to collision withother articles, so that the carved character or figure loses itsoriginal shape and becomes dirty, thereby injuring beauty on appearance.

DISCLOSURE OF THE INVENTION

[0008] Accordingly, the present invention is directed to a handgripstructure and a method for fabricating the same that substantiallyobviate one or more of the problems due to limitations and disadvantagesof the related art.

[0009] An object of the present invention is to provide a new structureof a handgrip and a method for fabricating the same in which a problemin that coating peels off and a problem in that carved or relievedfigure or character is damaged are solved, thereby capable of developingthe beauty on appearance of the handgrip differentially from aconventional one.

[0010] Another object of the present invention is to provide a structureof a handgrip and a method for fabricating the same in which it ispossible to develop beauty on appearance of the handgrip differentiallyfrom a conventional one, and weight thereof decreases to make it easy tohandle it.

[0011] A further another object of the present invention is to provide astructure of a handgrip and a method for fabricating the same in whichin the handgrip structure in which a problem in that coating peels off,or a problem in that relieved or carved character or figure is damagedis solved, and it is possible to develop beauty on appearance of thehandgrip differentially from a conventional one, a phenomenon in that ittakes a long time in filling resin in a shell forming process, aphenomenon in that resin is not filled, and a phenomenon in that a weldline is formed are solved, and a problem in that an adhesive forcebetween core surface as treated and shell is insufficient and thus aspace is created between the core and the shell, and a scratch problemoccurring when the shell is a soft material, can be solved.

[0012] Additional features and advantages of the invention will be setforth in the description which follows, and in part will be apparentfrom the description, or may be learned by practice of the invention.The objectives and other advantages of the invention will be realizedand attained by the structure particularly pointed out in the writtendescription and claims thereof as well as the appended drawings.

[0013] To achieve these and other advantages and in accordance with thepurpose of the present invention, as embodied and broadly described,there is provided a handgrip comprising a colored core and a transparentshell covering the core.

[0014] According to a second aspect of the invention, there is provideda method for fabricating a handgrip, said method comprising the stepsof: injecting a resin into a cavity of a mold for forming a core to forma core; extracting the formed core from the core forming mold; loadingthe core extracted from the core forming mold into a shell forming moldhaving a cavity that is larger in volume than the core; injecting atransparent resin into the cavity of the shell forming mold to form ashell covering the core; extracting the handgrip comprised of the coreand the shell covering the core from the shell forming mold.

[0015] According to a third aspect of the invention, there is provided ahandgrip comprising a colored core having a cavity therein and atransparent shell covering the core.

[0016] According to a fourth aspect of the invention, there is provideda method for fabricating a handgrip, said method comprising the stepsof: injecting a resin into a cavity of a mold for forming a core;blowing a gas into an interior of the core to form the core having acavity therein; extracting the formed core from the core forming mold;loading the core extracted from the core forming mold into a shellforming mold having a cavity that is larger in volume than the core;injecting a transparent resin into the cavity of the shell forming moldto form a shell covering the core; extracting the handgrip comprised ofthe core and the shell covering the core from the shell forming mold.

[0017] According to a fifth aspect of the invention, there is provided ahandgrip comprising a colored core having a cavity therein and atransparent shell covering the core.

[0018] According to a sixth aspect of the invention, there is provided amethod for fabricating a handgrip, said method comprising the steps of:injecting a resin into a cavity of a mold for forming a core; blowing agas into an interior of the core to form the core having a cavitytherein and a coupling boss at both ends thereof; extracting the formedcore from the core forming mold; loading the core extracted from thecore forming mold into a shell forming mold having a cavity that islarger in volume than the core; injecting a transparent resin into thecavity of the shell forming mold to form a shell covering the core;extracting the handgrip comprised of the core and the shell covering thecore from the shell forming mold.

[0019] According to a seventh aspect of the invention, there is provideda handgrip comprising a colored core having a concaved groove formedwholly along a length direction at a lower surface thereof, and atransparent shell covering the core.

[0020] According to an eighth aspect of the invention, there is provideda method for fabricating a handgrip, said method comprising the stepsof: injecting a resin into a cavity of a mold for forming a core to formthe core having a color and a concaved groove formed wholly along alength direction at a lower surface thereof; extracting the formed corefrom the core forming mold; loading the core extracted from the coreforming mold into a shell forming mold having a cavity that is larger involume than the core; injecting a transparent resin into the cavity ofthe shell forming mold to form a shell covering the core; extracting thehandgrip comprised of the core and the shell covering the core from theshell forming mold.

[0021] According to a ninth aspect of the invention, there is provided amethod for fabricating a handgrip, said method comprising the steps of:molding a core having a predetermined curvature; loading the core into ashell forming mold having a cavity that is larger in volume than thecore; and injecting a transparent resin into the cavity of the shellforming mold to form a shell covering the core, wherein a gate of theshell forming mold is located prior to performing the step of formingthe shell at a position forming a thick leaf portion after completion ofthe forming of the shell.

[0022] At this time, the gate of the shell forming mold is formedpreferably declined by a predetermined angle with respect to ahorizontal plane, and more preferably, declined along a tangentdirection drawn to pass through one end of the gate and be in contactwith an upper surface of the core.

[0023] Meanwhile, prior to loading the molded core into the shellforming mold, a surface treatment for coloring a surface of the core iscarried out.

[0024] At this time, the surface treatment includes the steps of:covering a predetermined region of the core with a mask so as to definethe predetermined region where a colored layer should not be formed;forming the colored layer except for the predetermined region coveredwith the mask; and removing the mask.

[0025] Meanwhile, after the molding of the shell, if the shell is of asoft material such as Surlyn or the like, a glossy wax is coated on thesurface of the shell.

[0026] According to the handgrips of the invention having the aboveconstructions, there is solved a problem of the conventional handgrip inthat coating peels off, or relieved or carved figure or character isdamaged, and it becomes possible to develop beauty of the handgrip onappearance.

[0027] It is to be understood that both the foregoing generaldescription and the following detailed description are exemplary andexplanatory and are intended to provide further explanation of theinvention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are included to provide afurther understanding of the invention and are incorporated in andconstitute a part of this specification, illustrate embodiments of theinvention and together with the description serve to explain theprinciples of the invention.

[0029] In the drawings:

[0030]FIG. 1 is a perspective view of a handgrip applied to homeappliances or the like according to the conventional art;

[0031]FIG. 2 is a perspective view showing one application example of ahandgrip structure according to an embodiment of the present invention;

[0032]FIG. 3 is a plan view of a handgrip according to a firstembodiment of the present invention;

[0033]FIG. 4 is a bottom view of FIG. 3;

[0034]FIG. 5 is a longitudinal sectional view taken along the line I-Iof FIG. 3;

[0035]FIG. 6 is a flow chart showing a fabrication procedure of ahandgrip according to a first embodiment of the present invention;

[0036]FIG. 7 is a schematic view showing a state in which a core isloaded into a mold;

[0037]FIG. 8a is a plan view of the core shown in FIG. 7;

[0038]FIG. 8b is a front view of FIG. 8a;

[0039]FIG. 9 is a schematic view of a state in which a core is loadedinto a mold according to another embodiment of the present invention;

[0040]FIG. 10 is a plan view of a handgrip according to a secondembodiment of the present invention;

[0041]FIG. 11 is a bottom view of FIG. 10;

[0042]FIG. 12 is a longitudinal sectional view taken along the line I-Iline;

[0043]FIG. 13 is a flow chart showing a fabrication procedure of ahandgrip according to a second embodiment of the present invention;

[0044]FIG. 14 is a view schematically showing the fabrication procedureof FIG. 13;

[0045]FIG. 15 is a schematic view showing a state in which a core isloaded into a mold;

[0046]FIG. 16a is a plan view of the core shown in FIG. 15;

[0047]FIG. 16b is a front view of FIG. 16a;

[0048]FIG. 17 is a schematic view showing a state in which a core isloaded into a mold according to another embodiment of the presentinvention;

[0049]FIG. 18 is a plan view of a handgrip according to a thirdembodiment of the present invention;

[0050]FIG. 19 is a bottom view of FIG. 18;

[0051]FIG. 20 is a longitudinal sectional view taken along the line I-Iof FIG. 18;

[0052]FIG. 21 is a flow chart showing a fabrication procedure of ahandgrip according to a third embodiment of the present invention;

[0053]FIG. 22 is a conceptual view schematically showing the fabricationprocedure of FIG. 21;

[0054]FIG. 23 is a schematic view showing a state in which a core isloaded into a mold;

[0055]FIG. 24a is a plan view showing the core structure of FIG. 20;

[0056]FIG. 24b is a front view of FIG. 24a;

[0057]FIG. 25 is a plan view of a handgrip according to a fourthembodiment of the present invention;

[0058]FIG. 26 is a bottom view of FIG. 25;

[0059]FIG. 27 is a longitudinal sectional view taken along the line I-Iof FIG. 25;

[0060]FIG. 28 is a perspective view of the core shown in FIG. 27;

[0061]FIG. 29 is a flow chart showing a fabrication procedure accordingto a fourth embodiment of the present invention;

[0062]FIG. 30 is to illustrate a problem that may be generated in thefabricating methods of a handgrip, that have been applied prior to amethod for fabricating a handgrip according to a fifth embodiment of thepresent invention, and is a sectional view showing a state in which thehandgrip is loaded into a shell forming mold;

[0063]FIG. 31 is to illustrate a method for fabricating a handgripaccording to a fifth embodiment of the present invention, and is asectional view showing a state in which core is loaded into a shellforming mold;

[0064]FIG. 32 is to illustrate a characteristic of the method accordingto the fifth embodiment, and is an exemplary sectional view of a maskingregion arranged on the surface of a core; and

[0065]FIG. 33 is a bottom perspective view of a core, which shows themasking region of FIG. 32.

DESCRIPTION OF REFERENCE NUMERALS IN MAIN PORTIONS OF THE DRAWINGS

[0066]  1 Handgrip  2 Core 200 Clamping rib 210 Supporting rib 220Concaved portion 230 Reinforcing rib 240a, 240b Coupling boss 250 Cavitypart 260 Concaved groove  3 Shell  4 Shell forming mold  4a Upper mold 4b Lower mold  40 Shell forming mold  40a Upper mold  40b Lower mold410 Gate 500 Masking region

BEST MODE FOR CARRYING OUT THE INVENTION

[0067] Reference will now be made in detail to the preferred embodimentsof the present invention, examples of which are illustrated in theaccompanying drawings of FIGS. 2 to 33.

[0068] First, a handgrip structure and a fabrication method thereofaccording to a first embodiment of the present invention will bedescribed with reference to FIGS. 2 to 9.

[0069]FIG. 2 is a perspective view showing one application example of ahandgrip structure according to an embodiment of the present invention,FIG. 3 is a plan view of a handgrip according to a first embodiment ofthe present invention, FIG. 4 is a bottom view of FIG. 3, and FIG. 5 isa longitudinal sectional view taken along the line I-I of FIG. 3.

[0070] A handgrip 1 according to a first embodiment of the presentinvention includes a colored core 2, and a transparent shell 3 coveringthe core 2.

[0071] The core 2 is preferably made in a bar type. In case of the bartype core, it is more preferably that the core 2 has a predeterminedcurvature along a selected direction for an easy grip.

[0072] At least one of both ends of the core 2 is a streamline shape,and at least one of both ends of the shell 3 may be a streamline shape.

[0073] At least one end of the shell 3 may be a fan shape as it travelsto both ends. Especially, a portion corresponding to both oblique sidesof the fan shape is preferably inwardly curved for an easy grip.

[0074] In other words, in the fan shape structure of the shell 3, incase the portion corresponding to both oblique sides is inwardly curved,when looking at the grip of the handgrip 1 according to the firstembodiment of the present invention from the ergonomic point of view,the handgrip is well harmonized with shape of side palm as fisted andshape of thumb or middle finger, thereby making a role in increasinggrip force for the handgrip 1 and helping to easily grip the handgrip 1.

[0075] For saving material and forming time, and preventing acontraction phenomenon upon forming the handgrip, it is desirous that aconcaved portion 220 is formed on a lower surface of the core 2. In thiscase, a reinforcing rib for the enhancement of strength is preferablyprovided in the concaved portion 220 on the lower surface of the core 2.

[0076] The reason is to prevent the core 2 from being deformed bytransparent resin that is injected at high speed and high pressure forthe formation of the shell 3. The reinforcing rib 3 may be formed invarious shapes, for instance, lattice shape.

[0077] Meanwhile, FIG. 7 schematically shows a state in which a core 2having a clamping rib 200 formed at both ends thereof is loaded into amold, FIGS. 8a and 8 b are respectively a plan view and a front view ofthe core shown in FIG. 7. The core 2 includes the clamping rib 200 whichwhen the core is loaded into a mold for the formation of shell, allowsthe core to be supported by the mold. It is preferable that the clampingrib 200 is respectively provided at both ends of the core 2, inparticular at a lower side of the both ends of the core 2 so as to beclamped between an upper mold 4 a and a lower mold 4 b. Why the clampingrib 200 is provided at the lower side of the both ends of the core 2 is,in case of removing the clamping rib 200 after the formation of theshell, to get rid of the trace that the clamping rib 200 was placed.

[0078]FIG. 9 is a schematic view of a state in which a core is loadedinto a mold according to another embodiment of the present invention,and corresponds to a case in which a clamping rib 200 is formed at oneend portion of the core 2, and a supporting rib 210 is formed on abottom surface of the other end. The supporting rib 210 is, when thecore is loaded into a shell forming mold 4, in contact with a bottomsurface of a cavity of a lower mold.

[0079] In other words, at the bottom surface of at least one end portionof the both end portions of the core 2 is formed the supporting rib 210,when the core is loaded into the shell forming mold 4, in contact with abottom surface of a cavity of a lower mold 4 b.

[0080] Naturally, in this case, a mold designed differently than thatshown in FIG. 7 is used.

[0081] Meanwhile, a metal layer may be formed on the surface of the core2. At this time, the metal layer is formed by a plating method or asputtering deposition.

[0082] Simultaneously, a color may be added to the shell 3 so as tomaintain transparency of the shell 3 and beautify the appearance. Inother words, the shell 3 may be formed from a transparent resin that hasa color but does not weaken or harm the transparency and at the sametime beautifies the appearance.

[0083] Preferably, the core 2 has a material property of which meltingpoint is higher than that of the shell 3. More specifically, it isdesirous that the melting point of the core 2 is 200° C. or more and themelting point of the shell 3 is below 150° C.

[0084] Also, the core is of a material having impact-resistant, highstrength, high fluidity, high gloss and high plating-adhering strength.For example, the core is of Nylon, PC (Polycarbonate) or the like.

[0085] Meanwhile, the shell 3 is of a material having impact-resistant,high strength, high fluidity, fire retardancy, heat-resistant,chemical-resistant, corrosion-resistant and charging-preventingproperties. In order to satisfy these conditions, the shell is of ABS,PMMA, Surlyn, ASA, ALPHALAC or the like.

[0086] A character or figure may be carved or relieved on the surface ofthe core 2. In this case, the character or figure carved or relieved onthe surface of the core 2 is the transparent shell 3 and thus isrecognizable from an outside, and since a contact of the character orfigure with other article is prevented, there exists an advantage inthat the character or figure loses its original shape.

[0087] Meanwhile, the core 2 may be formed of metal, which is to preparein case a weight or a very high strength necessary for the handgrip isrequested.

[0088] Also, it is desirous that the core 2 or the lower surface of theshell 3 has a dimple structure such that it is easy to grip thehandgrip.

[0089] Further, the handgrip 1 according to the first embodiment of theinvention is molded to have a coupling boss 240 a, 240 b. Accordingly,the handgrip 1 is screw-coupled with a door, or a coupling hole isdirectly processed on the bottom surface after molding thereof, and thenit is screw-coupled with a door or the like. In case the supporting rib210 is placed at the lower surface of both ends of the core 2, thecoupling hole may be processed on the supporting rib 210.

[0090] A method for fabricating a handgrip having the above structureaccording to the first embodiment of the present invention is describedwith reference to FIGS. 6 to 9.

[0091] First, a mold (not shown) for forming a core is prepared and amelted resin having a color is injected into the core forming mold at ahigh speed and a high pressure. In other words, the core is formed by aninjection molding that is a representative of plastic processing methodsand is widely used in processing plastic products having a complicatedshape.

[0092] At this time, the core forming mold is designed to be provided,at an outer side thereof when the core has been formed, with a clampingrib 200 that is clamped by a mold 4 for forming a shell.

[0093] Meanwhile, after the injection of the melted resin into thecavity of the core forming mold, the injected resin is cooled.

[0094] After the resin has been cooled, the core forming mold is openedand the formed core 2 is extracted from the core forming mold.

[0095] Next, the core 2 extracted from the core forming mold is loadedinto a shell forming mold 4 having a cavity 400 that is larger in volumethan the core 2. At this time, the clamping rib 200 of the core 2 isclamped by an upper mold 4 a and a lower mold 4 b to be supported, sothat a space part is formed between the core 2 loaded into the shellforming mold 4 and the inner wall of the cavity 400 of the shell formingmold.

[0096] As above, after the core 2 has been loaded into the shell formingmold 4, the melted resin is injected into the cavity 400 of the shellforming mold 4 at a high speed and a high pressure, and after thecompletion of the injection, the injected transparent resin is cooled.

[0097] After the completion of the cooling, a handgrip including thecore 2 and the shell 3 covering the core 2 is extracted from the shellforming mold 4.

[0098] Thereafter, the clamping rib 200 formed on the outer surface ofthe core 2 of the extracted handgrip is removed, so that only the core 2and the shell 3 remain.

[0099] In other words, since the clamping rib 200 is formed at a lowerside of one end of the core 2, when the handgrip from which the clampingrib 200 is removed is installed in a door or the like as shown in FIG.2, a trace of the clamping rib 200 does not remain, so that appearanceof the handgrip is beautified.

[0100] Meanwhile, in case a supporting protrusion is downwardly formedat the bottom surface of one end of the core and clamping rib 200 isarranged at the other end of the core, a trace of the clamping rib 200or the supporting protrusion is not shown on appearance likewise.

[0101] In the aforementioned fabrication method of the handgrip 1according to the first embodiment of the present invention, the core maybe fabricated by blow molding.

[0102] Also, after the completion of the forming of the core 2, prior toloading the core 2 into the shell forming mold 4, the step of carving orrelieving a character or figure on the surface of the formed core 2 maybe further included.

[0103] Separately, after the completion of the forming of the core 2, ametal layer may be formed on the surface of the core 2, which is formedby a plating or a sputtering deposition.

[0104] Further, the core 2 applied to the fabrication method of thehandgrip according to the first embodiment of the present invention ismade of a material of which melting point should be 200° C. or more andthe melting point of the shell should be below 150° C.

[0105] Furthermore, the core 2 is preferably of a material havingimpact-resistant, high strength, high fluidity, high gloss and highplating-adhering strength properties. The material having the aboveproperties of the core 2 includes Nylon and PC.

[0106] Moreover, the shell 3 is of a material having impact-resistant,high strength, high fluidity, fire retardancy, heat-resistant,chemical-resistant, corrosion-resistant and charging-preventingproperties. The material having the above properties of the shell 3includes ABS, PMMA, Surlyn, ASA and ALPHALAC.

[0107] Also, the shell 3 applied to the fabrication method of thehandgrip according to the first embodiment of the present invention is atransparent resin that has a color but does not weaken or harm thetransparency and at the same time beautifies the appearance.

[0108] Next, a second preferred embodiment of the invention will be nowdescribed in detail with reference to the accompanying drawings of FIG.2 and FIGS. 10 to 17.

[0109]FIG. 2 is a perspective view showing one application example of ahandgrip structure according to a second embodiment of the presentinvention, FIG. 10 is a plan view of a handgrip according to a secondembodiment of the present invention, FIG. 11 is a bottom view of FIG.10, and FIG. 12 is a longitudinal sectional view taken along the lineI-I line.

[0110] A handgrip 1 according to a second embodiment of the presentinvention includes a colored core 2 having a cavity therein, and atransparent shell covering the core 2. The core 2 is preferably made ina bar type. In case of the bar type core, it is more preferably that thecore 2 has a predetermined curvature along a selected direction for aneasy grip.

[0111] At least one of both ends of the core 2 is a streamline shape,and at least one of both ends of the shell 3 may be a streamline shape.

[0112] At least one end of the shell 3 may be a fan shape as it travelsto both ends. Especially, a portion corresponding to both oblique sidesof the fan shape is preferably inwardly curved for an easy grip.

[0113] In other words, in the fan shape structure of the shell 3, incase the portion corresponding to both oblique sides is inwardly curved,when looking at the grip of the handgrip according to the secondembodiment of the present invention from the ergonomic point of view,the handgrip is well harmonized with shape of side palm as fisted andshape of thumb or middle finger, thereby making a role in increasinggrip force for the handgrip 1 and helping to easily grip the handgrip 1.

[0114] Meanwhile, FIG. 15 is a schematic view showing a state in whichthe core 2 having a clamping rib 200 formed at both ends is loaded intoa mold, FIGS. 16a and 16 b are respectively a plan view of the coreshown in FIG. 15 and a front view. The core 2 includes the clamping rib200 which when the core 2 is loaded into a mold for the formation ofshell, allows the core to be supported by the mold. It is preferablethat the clamping rib 200 is respectively provided at both ends of thecore 2, in particular at a lower side of the both ends of the core 2 soas to be clamped between an upper mold 4 a and a lower mold 4 b.

[0115] Why the clamping rib 200 is provided at the lower side of theboth ends of the core 2 is, in case of removing the clamping rib 200after the formation of the shell, to get rid of the trace that theclamping rib 200 was placed.

[0116]FIG. 17 is a schematic view showing a state in which the core isloaded into a mold according to another embodiment of the presentinvention, and corresponds to a case in which a clamping rib 200 isformed at one end portion of the core 2, and a supporting rib 210 isformed on a bottom surface of the other end. The supporting rib 210 is,when the core is loaded into a shell forming mold 4, in contact with abottom surface of a cavity 400 of a lower mold.

[0117] In other words, at the bottom surface of at least one end portionof the both end portions of the core 2 is formed the supporting rib 210,when the core is loaded into the shell forming mold 4, in contact with alower mold 4 b.

[0118] Naturally, in this case, a mold designed differently than thatshown in FIG. 15 is used.

[0119] Meanwhile, a metal layer may be formed on the surface of the core2. At this time, the metal layer is formed by a plating method or asputtering deposition.

[0120] Simultaneously, a color may be added to the shell 3 so as tomaintain transparency of the shell 3 and beautify the appearance. Inother words, the shell 3 may be formed from a transparent resin that hasa color but does not weaken or harm the transparency and at the sametime beautifies the appearance.

[0121] Preferably, the core 2 has a material property of which meltingpoint is higher than that of the shell 3. More specifically, it isdesirous that the melting point of the core 2 is 200° C. or more and themelting point of the shell 3 is below 150° C.

[0122] Also, the core is of a material having impact-resistant, highstrength, high fluidity, high gloss and high plating-adhering strength.An example of the core material for satisfying such conditions includesNylon, PC (Polycarbonate) or the like.

[0123] Meanwhile, the shell 3 is of a material having impact-resistant,high strength, high fluidity, fire retardancy, heat-resistant,chemical-resistant, corrosion-resistant and charging-preventingproperties. In order to satisfy these conditions, the shell is of ABS,PMMA, Surlyn, ASA, ALPHALAC or the like.

[0124] A character or figure may be carved or relieved on the surface ofthe core 2.

[0125] Meanwhile, it may be desirous that the core 2 is heavy. In thiscase, the core 2 may be of metal.

[0126] Also, it is desirous that the core 2 or the lower surface of theshell 3 has a dimple structure such that it is easy to grip thehandgrip.

[0127] Further, the handgrip 1 according to the second embodiment of theinvention is molded to have a coupling boss 240 a, 240 b at both endsthereof. Accordingly, the handgrip 1 is screw-coupled with a door, or acoupling hole is directly processed on the bottom surface after moldingthereof, and then it is screw-coupled with a door or the like. In casethe supporting rib 210 is placed at the lower surface of both ends ofthe core 2, the coupling hole may be processed on the supporting rib210.

[0128] A method for fabricating a handgrip having the above structureaccording to the second embodiment of the present invention is describedwith reference to FIGS. 13 to 17.

[0129] First, a mold 6 for forming a core is prepared and a melted resinhaving a color is injected into the core forming mold 6. (Refer to “(a)”of FIG. 14) In other words, the core is formed by an injection moldingthat is a representative of plastic processing methods and is widelyused in processing plastic products having a complicated shape.

[0130] At this time, the core forming mold 6 may be designed to beprovided, at an outer side thereof when the core has been formed, with aclamping rib 200 that is clamped by a mold 4 for forming a shell.

[0131] Meanwhile, after the injection of the melted resin into thecavity of the core forming mold 6 by a certain amount, a gas is injectedinto an interior of the melted resin to thereby expand the melted resin.(Refer to “(b) of FIG. 14)

[0132] Thereafter, the melted resin is cooled through a holding pressureprocess with preventing contraction of the resin. (Refer to “(c)” ofFIG. 14) Thereafter, the gas is exhausted to complete the forming of thecore having the hollow cavity for the handgrip. (Refer to “(d)” of FIG.14)

[0133] In the holding pressure process that is carried out as the nextprocess to the injection process of the melted resin inside the mold, aspecific pressure is applied to the injection inlet of the resin, and inthis state, cooling of the filled material is carried out along with anadditive introduction of the resin by the pressing, so that it becomespossible to minimize non-uniform contraction causing warpage of product.

[0134] Meanwhile, after the molded core 2 is extracted, the extractedcore 2 is loaded into a shell forming mold 4 having a cavity 400 that islarger in volume than the core 2 and an insertion injection is carriedout to complete a handgrip. (Refer to “(e)” of FIG. 14) At this time,the clamping rib 200 of the core 2 is clamped by an upper mold 4 a and alower mold 4 b to be supported, so that a space part is formed betweenthe core 2 loaded into the shell forming mold 4 and the inner wall ofthe cavity 400 of the shell forming mold 4.

[0135] As above, after the core 2 has been loaded into the shell formingmold 4, the melted resin is injected into the cavity 400 of the shellforming mold 4 at a high speed and a high pressure, and after thecompletion of the injection, the injected transparent resin is cooled.

[0136] After the completion of the cooling, a handgrip including thecore 2 and the shell 3 covering the core 2 is extracted from the shellforming mold 4.

[0137] Thereafter, the clamping rib 200 formed on the outer surface ofthe core 2 of the extracted handgrip is removed, so that only the core 2and the shell 3 remain.

[0138] In other words, since the clamping rib 200 is formed at a lowerside of one end of the core 2, when the handgrip from which the clampingrib 200 is removed is installed in a door or the like as shown in FIG.2, a trace of the clamping rib 200 does not remain, so that appearanceof the handgrip is beautified.

[0139] Meanwhile, in case a supporting protrusion is downwardly formedat the bottom surface of one end of the core and clamping rib 200 isarranged at the other end of the core, a trace of the clamping rib 200or the supporting protrusion is not shown on appearance likewise.

[0140] Also, after the completion of the forming of the core 2, prior toloading the core 2 into the shell forming mold 4, the step of carving orrelieving a character or figure on the surface of the formed core 2 maybe further included.

[0141] Separately, after the completion of the forming of the core 2, ametal layer may be formed on the surface of the core 2, which is formedby a plating or a sputtering deposition.

[0142] Further, the core 2 applied to the fabrication method of thehandgrip according to the second embodiment of the present invention ismade of a material of which melting point should be 200° C. or more andthe melting point of the shell should be below 150° C.

[0143] Furthermore, the core 2 is preferably of a material havingimpact-resistant, high strength, high fluidity, high gloss and highplating-adhering strength properties. The material having the aboveproperties of the core 2 includes Nylon and PC.

[0144] Moreover, the shell 3 is of a material having impact-resistant,high strength, high fluidity, fire retardancy, heat-resistant,chemical-resistant, corrosion-resistant and charging-preventingproperties. The material having the above properties of the shell 3includes ABS, PMMA, Surlyn, ASA and ALPHALAC.

[0145] According to the second embodiment of the present invention, theresin may be a transparent resin that has a color but does not weaken orharm the transparency and at the same time beautifies the appearance.

[0146] Next, a third preferred embodiment of the invention will be nowdescribed in detail with reference to the accompanying drawings of FIGS.18 to 24 b.

[0147]FIG. 2 is a perspective view showing one application example of ahandgrip structure according to a third embodiment of the presentinvention, FIG. 18 is a plan view of a handgrip according to a thirdembodiment of the present invention, FIG. 19 is a bottom view of FIG.18, and FIG. 20 is a longitudinal longitudinal sectional view takenalong the line I-I of FIG. 18.

[0148] A handgrip 1 according to a third embodiment of the presentinvention includes a colored core 2 having a cavity therein and acoupling boss formed at both ends thereof, and a transparent shell 3covering the core 2.

[0149] At this time, the core 2 is preferably made in a bar type. Incase of the bar type core, it is more preferably that the core 2 has apredetermined curvature along a selected direction for an easy grip.

[0150] At least one of both ends of the core 2 is a streamline shape,and at least one of both ends of the shell 3 may be a streamline shape.

[0151] At least one end of the shell 3 may be a fan shape as it travelsto both ends. Especially, a portion corresponding to both oblique sidesof the fan shape is preferably inwardly curved for an easy grip.

[0152] In other words, in the fan shape structure of the shell 3, incase the portion corresponding to both oblique sides is inwardly curved,when looking at the grip of the handgrip according to the thirdembodiment of the present invention from the ergonomic point of view,the handgrip is well harmonized with shape of side palm as fisted andshape of thumb or middle finger, thereby making a role in increasinggrip force for the handgrip 1 and helping to easily grip the handgrip 1.

[0153] Meanwhile, FIG. 23 is a schematic view showing a state in which acore 2 having a clamping rib 200 formed at both ends is loaded into amold, FIGS. 24a and 24 b are respectively a plan view of the core shownin FIG. 23 and a front view. The core 2 includes the clamping rib 200which when the core 2 is loaded into a mold for the formation of shell,allows the core to be supported by the mold. It is preferable that theclamping rib 200 is respectively provided at both ends of the core 2, inparticular at a lower side of the both ends of the core 2 so as to beclamped between an upper mold 4 a and a lower mold 4 b.

[0154] Why the clamping rib 200 is provided at the lower side of theboth ends of the core 2 is, in case of removing the clamping rib 200after the formation of the shell, to get rid of the trace that theclamping rib 200 was placed.

[0155] Meanwhile, a metal layer may be formed on the surface of the core2. At this time, the metal layer is formed by a plating method or asputtering deposition.

[0156] Simultaneously, a color may be added to the shell 3 so as tomaintain transparency of the shell 3 and beautify the appearance. Inother words, the shell 3 may be formed from a transparent resin that hasa color but does not weaken or harm the transparency and at the sametime beautifies the appearance.

[0157] Preferably, the core 2 has a material property of which meltingpoint is higher than that of the shell 3. More specifically, it isdesirous that the melting point of the core 2 is 200° C. or more and themelting point of the shell 3 is below 150° C.

[0158] Also, the core is of a material having impact-resistant, highstrength, high fluidity, high gloss and high plating-adhering strength.An example of the core material for satisfying such conditions includesNylon, PC (Polycarbonate) or the like.

[0159] Meanwhile, the shell 3 is of a material having impact-resistant,high strength, high fluidity, fire retardancy, heat-resistant,chemical-resistant, corrosion-resistant and charging-preventingproperties. In order to satisfy these conditions, the shell is of ABS,PMMA, Surlyn, ASA, ALPHALAC or the like.

[0160] A character or figure may be carved or relieved on the surface ofthe core 2.

[0161] Meanwhile, it may be desirous that the core 2 is heavy. In thiscase, the core 2 may be of metal.

[0162] Also, the lower surface of the shell 3 is formed in aconcavo-convex structure having a dimple portion such that slip isprevented to thereby make it easy to grip the handgrip.

[0163] Further, according to the third embodiment of the invention, thecoupling boss 240 a, 240 b functions to allow the handgrip to bescrew-coupled with a door, a lid or the like.

[0164] A method for fabricating a handgrip having the above structureaccording to the third embodiment of the present invention is describedwith reference to FIGS. 21 to 24 b.

[0165] First, in a state that a mold 6 for forming a core is prepared, amelted resin having a color is injected into the core forming mold 6.(Refer to “(a)” of FIG. 22) In other words, the core is formed by aninjection molding that is a representative of plastic processing methodsand is widely used in processing plastic products having a complicatedshape.

[0166] At this time, the core forming mold 6 may be designed to beprovided, at an outer side thereof when the core has been formed, with aclamping rib 200 that is clamped by a mold 4 for forming a shell, andwith a coupling boss 240 a, 240 b that is coupled with a door or thelike after the completion of the handgrip.

[0167] Meanwhile, after the injection of the melted resin into thecavity of the core forming mold 6 by a certain amount, a gas is injectedinto an interior of the melted resin to thereby expand the melted resin.(Refer to “(b) of FIG. 22)

[0168] Thereafter, the melted resin is cooled through an holdingpressure process with preventing contraction of the resin. (Refer to“(c)” of FIG. 22) Thereafter, the gas is exhausted to complete theforming of the core having the hollow cavity for the handgrip. (Refer to“(d)” of FIG. 22)

[0169] Here, in order to enable to form the coupling boss 240 a, 240 b,a groove 600 for forming the boss is formed in a lower mold of the mold6, and a rod-shaped rib 601 that after the mold 6 is removed, makes acoupling hole of the coupling boss 240 a, 240 b formed is provided at acenter portion of the boss forming groove 600.

[0170] In the holding pressure process that is carried out as the nextprocess to the injection process of the melted resin inside the mold, aspecific pressure is applied to the injection inlet of the resin, and inthis state, cooling of the filled material is carried out along with anadditive introduction of the resin by the pressing, so that it becomespossible to minimize non-uniform contraction causing warpage of product.

[0171] Meanwhile, after the molded core 2 is extracted, the extractedcore 2 is loaded into a shell forming mold 4 having a cavity 400 that islarger in volume than the core 2 and an insertion injection is carriedout to complete a handgrip. (Refer to “(e)” of FIG. 22)

[0172] In other words, the clamping rib 200 formed at one end of thecore 2 is clamped between an upper mold 4 a and a lower mold 4 b and atthe same time the coupling boss 240 a formed at the other end is incontact with inner surface of the lower mold 4 b, and thus the core issupported, so that a space part is formed between the core 2 loaded intothe shell forming mold 4 and the inner wall of the cavity 400 of theshell forming mold 4. After that, as above, after the core 2 has beenloaded into the shell forming mold 4, the melted resin is injected intothe cavity 400 of the shell forming mold 4 at a high speed and a highpressure, and after the completion of the injection, the injectedtransparent resin is cooled.

[0173] After the completion of the cooling, a handgrip including thecore 2 and the shell 3 covering the core 2 is extracted from the shellforming mold 4.

[0174] Thereafter, the clamping rib 200 formed on the outer surface ofthe core 2 of the extracted handgrip is removed, so that only the core 2and the shell 3 remain.

[0175] In other words, since the clamping rib 200 is formed at a lowerside of one end of the core 2, when the handgrip from which the clampingrib 200 is removed is installed in a door or the like as shown in FIG.2, a trace of the clamping rib 200 does not remain, so that appearanceof the handgrip is beautified.

[0176] Also, after the completion of the forming of the core 2, prior toloading the core 2 into the shell forming mold 4, the step of carving orrelieving a character or figure on the surface of the formed core 2 maybe further included.

[0177] Separately, after the completion of the forming of the core 2, ametal layer may be formed on the surface of the core 2, which is formedby a plating or a sputtering deposition.

[0178] Further, the core 2 applied to the fabrication method of thehandgrip according to the third embodiment of the present invention ismade of a material of which melting point should be 200° C. or more andthe melting point of the shell should be below 150° C.

[0179] Furthermore, the core 2 is preferably of a mater al havingimpact-resistant, high strength, high fluidity, high gloss and highplating-adhering strength properties. The material having the aboveproperties of the core 2 includes Nylon and PC.

[0180] Moreover, the shell 3 is of a material having impact-resistant,high strength, high fluidity, fire retardancy, heat-resistant,chemical-resistant, corrosion-resistant and charging-preventingproperties. The material having the above properties of the shell 3includes ABS, PMMA, Surlyn, ASA and ALPHALAC.

[0181] According to the third embodiment of the present invention, theresin may be a transparent resin that has a color but does not weaken orharm the transparency and at the same time beautifies the appearance.

[0182] Hereinafter, a handgrip structure and a method for fabricatingthe same according to a fourth embodiment of the present invention aredescribed with reference to FIG. 2 and FIGS. 25 to 29.

[0183]FIG. 2 is a perspective view showing one application example of ahandgrip structure according to a fourth embodiment of the presentinvention, FIG. 25 is a plan view of a handgrip according to a fourthembodiment of the present invention, FIG. 26 is a bottom view of FIG.25, and FIG. 27 is a longitudinal sectional view taken along the lineI-I of FIG. 25.

[0184] Also, FIG. 28 is a perspective view of the core shown in FIG. 27,and FIG. 29 is a flow chart showing a fabrication procedure according toa fourth embodiment of the present invention.

[0185] According to a fourth embodiment of the present invention, ahandgrip 1 includes a colored core 2 having a concaved groove formedwholly along a length direction at a lower surface thereof and acoupling boss formed at both ends thereof, and a transparent shell 3covering the core 2. Here, the core 2 is preferably made in a bar type.In case of the bar type core, it is more preferably that the core 2 hasa predetermined curvature along a selected direction for an easy grip.

[0186] At least one of both ends of the core 2 is a streamline shape,and at least one of both ends of the shell 3 may be a streamline shape.

[0187] At least one end of the shell 3 may be a fan shape as it travelsto both ends. Especially, a portion corresponding to both oblique sidesof the fan shape is preferably inwardly curved for an easy grip.

[0188] In other words, in the fan shape structure of the shell 3, incase the portion corresponding to both oblique sides is inwardly curved,when looking at the grip of the handgrip according to the fourthembodiment of the present invention from the ergonomic point of view,the handgrip is well harmonized with shape of a side of the hand asfisted and shape of thumb or middle finger, thereby making a role inincreasing grip force for the handgrip 1 and helping to easily grip thehandgrip 1.

[0189] Meanwhile, the core 2 has a clamping rib 200 such that the core 2is supported within a mold when the core is loaded into the mold to formthe shell 3. The clamping rib 200 is provided at one end of the core 2such that the clamping rib 200 is clamped between the lower mold and theupper mold, to support the core 2 along with the coupling boss 240 a,240 b.

[0190] Why the clamping rib 200 is provided at the lower side of one endof the core 2 is, in case of removing the clamping rib 200 after theformation of the shell 3, to get rid of the trace that the clamping rib200 was placed.

[0191] Meanwhile, a metal layer may be formed on the surface of the core2. At this time, the metal layer is formed by a plating method or asputtering deposition.

[0192] Simultaneously, a color may be added to the shell 3 so as tomaintain transparency of the shell 3 and beautify the appearance. Inother words, the shell 3 may be formed from a transparent resin that hasa color but does not weaken or harm the transparency and at the sametime beautifies the appearance.

[0193] Preferably, the core 2 has a material property of which meltingpoint is higher than that of the shell 3. More specifically, it isdesirous that the melting point of the core 2 is 200° C. or more and themelting point of the shell 3 is below 150° C.

[0194] Also, the core is of a material having impact-resistant, highstrength, high fluidity, high gloss and high plating-adhering strength.An example of the core material for satisfying such conditions includesNylon, PC (Polycarbonate) or the like.

[0195] Meanwhile, the shell 3 is of a material having impact-resistant,high strength, high fluidity, fire retardancy, heat-resistant,chemical-resistant, corrosion-resistant and charging-preventingproperties. In order to satisfy these conditions, the shell is of ABS,PMMA, Surlyn, ASA, ALPHALAC or the like.

[0196] Also, character or figure may be carved or relieved on thesurface of the core 2.

[0197] Also, the lower surface of the shell 3 is formed in aconcavo-convex structure having a dimple portion such that slip isprevented to thereby make it easy to grip the handgrip.

[0198] According to the fourth embodiment of the invention, the couplingboss 240 a, 240 b formed at both ends during the molding of the corefunctions to allow the handgrip to be screw-coupled with a door, a lidor the like.

[0199] Hereinafter, a method for fabricating a handgrip having the abovestructure according to the fourth embodiment of the present invention isdescribed as follows.

[0200] First, in a state that a mold 6 for forming a core is prepared, amelted resin having a color is injected into the core forming mold 6. Inother words, the core is formed by an injection molding that is arepresentative of plastic processing methods and is widely used inprocessing plastic products having a complicated shape.

[0201] At this time, the core forming mold 6 may be designed to have atan outer side thereof when the core has been formed, a clamping rib 200that is clamped by a mold for forming a shell, a coupling boss 240 a,240 b that is coupled with a door or the like after the completion ofthe handgrip, and a concaved groove 260 below the coupling boss.

[0202] Here, in order to enable to form the coupling boss 240 a, 240 b,a groove for forming the boss is formed in a lower mold of the mold 6,and a rod-shaped rib that after the mold 6 is removed, makes a couplinghole of the coupling boss 240 a, 240 b formed is provided at a centerportion of the boss forming groove.

[0203] Meanwhile, after the molded core 2 is extracted, the extractedcore 2 is loaded into a shell forming mold 4 having a cavity 400 that islarger in volume than the core 2 and an insertion injection is carriedout to complete a handgrip.

[0204] In other words, the clamping rib 200 formed at one end of thecore 2 is clamped between an upper mold 4 a and a lower mold 4 b and atthe same time the coupling boss 240 a formed at the other end is incontact with inner surface of the lower mold 4 b, and thus the core issupported, so that a space part is formed between the core 2 loaded intothe shell forming mold 4 and the inner wall of the cavity 400 of theshell forming mold 4. After that, after the core 2 has been loaded intothe shell forming mold, the melted resin is injected into the cavity ofthe shell forming mold at a high speed and a high pressure, and afterthe completion of the injection, the injected transparent resin iscooled.

[0205] After the completion of the cooling, a handgrip including thecore 2 and the shell 3 covering the core 2 is extracted from the shellforming mold 4.

[0206] Thereafter, the clamping rib 200 formed on the outer surface ofthe core 2 of the extracted handgrip is removed, so that only the core 2and the shell 3 remain.

[0207] In other words, since the clamping rib 200 is formed at a lowerside of one end of the core 2, when the handgrip from which the clampingrib 200 is removed is installed in a door or the like as shown in FIG.2, a trace of the clamping rib 200 does not remain, so that appearanceof the handgrip is beautified.

[0208] Also, after the completion of the forming of the core 2, prior toloading the core 2 into the shell forming mold 4, the step of carving orrelieving a character or figure on the surface of the formed core 2 maybe further included.

[0209] Separately, after the completion of the forming of the core 2, ametal layer may be formed on the surface of the core 2, which is formedby a plating or a sputtering deposition.

[0210] Further, the core 2 applied to the fabrication method of thehandgrip according to the fourth embodiment of the present invention ismade of a material of which melting point should be 200° C. or more andthe melting point of the shell should be below 150° C.

[0211] Furthermore, the core 2 is preferably of a material havingimpact-resistant, high strength, high fluidity, high gloss and highplating-adhering strength properties. The material having the aboveproperties of the core 2 includes Nylon and PC.

[0212] Moreover, the shell 3 is of a material having impact-resistant,high strength, high fluidity, fire retardancy, heat-resistant,chemical-resistant, corrosion-resistant and charging-preventingproperties. The material having the above properties of the shell 3includes ABS, PMMA, Surlyn, ASA and ALPHALAC.

[0213] According to the fourth embodiment of the present invention, theresin may be a transparent resin that has a color but does not weaken orharm the transparency and at the same time beautifies the appearance.

[0214] Meanwhile, FIG. 30 is to illustrate problems that may begenerated in the fabricating methods of a handgrip according to thefirst to fourth embodiments, and in the aforementioned first to fourthembodiments, there have been provided new handgrip structures andmethods for fabricating the same in which a problem in that coatingpeels off and a problem in that relieved or carved figure or characteris damaged are solved, thereby capable of developing the beauty onappearance of the handgrip differentially from a conventional one.

[0215] However, according to the fabrication methods of the handgripsdisclosed in the aforementioned respective embodiments, the followingproblems may be caused.

[0216] In other words, as shown in FIG. 30, in case of forming a shell 3by injecting resin in a state where a molded core 2 is loaded into ashell forming mold 40, a gate for the injection of the resin is locatedover the shell forming mold 40, so that a thin leaf portion (“A” of FIG.30) is first filled before a thick leaf portion (“B” of FIG. 30) locatedon the front of the shell 3 is filled. As a result, a time necessary infilling resin is lengthened, or a less-filling phenomenon occurs, andthus a weld line is formed on the shell 3, so that the appearance of thehandgrip may be harmed.

[0217] Here, the thick leaf portion is indicative of the front portionof the fan shaped shell 3, which is thicker than other portions, and thethin leaf portion is indicative of the rear portion, which is thin inthickness of the shell 3. The weld line is indicative of a line shown onappearance, which is formed at a mid portion where the melted resinrespectively fills left and right portions at different speeds startingfrom the thick leaf portion of the fan shape that is located at the rearside and again joins.

[0218] A fifth embodiment of the present invention is provided to solvethe aforementioned problems. Accordingly, in the below, the fifthembodiment will be described in detail with reference to FIGS. 31 to 33.

[0219]FIG. 31 is to illustrate a method for fabricating a handgripaccording to a fifth embodiment of the present invention, and is asectional view showing a state in which a core is loaded into a shellforming mold, FIG. 32 is to illustrate a characteristic of thefabrication method according to the fifth embodiment, and is anexemplary sectional view of a masking region arranged on the surface ofthe core, and FIG. 33 is a bottom perspective view of the core, whichshows the masking region of FIG. 32.

[0220] According to a fifth embodiment of the invention, a handgrip 1includes a core 2 and a transparent shell 3 covering the core 2.

[0221] Here, the core 2 has a predetermined curvature along a selecteddirection for an easy grip.

[0222] Also, a concaved groove 260 may be formed wholly along a lengthdirection on the lower surface of the core 2, and a coupling boss 240 a,240 b may be formed at both ends of the core 2.

[0223] At least one end of the shell 3 may be a fan shape as it travelsto both ends.

[0224] Especially, a portion corresponding to both oblique sides of thefan shape is preferably inwardly curved for an easy grip.

[0225] In other words, in case the portion corresponding to both obliquesides in the fan shape of the shell 3 is inwardly curved, from theergonomic point of view, the handgrip is well harmonized with shape of aside of the hand as fisted and shape of thumb or middle finger, therebymaking a role in increasing grip force for the handgrip 1 and helping toeasily grip the handgrip 1.

[0226] Meanwhile, a colored layer formed on the surface of the core 2 isof a colored metal layer. At this time, the colored metal layer isformed by a plating method or a sputtering deposition.

[0227] Simultaneously, a color may be added to the shell 3 so as tomaintain transparency of the shell 3 and beautify the appearance. Inother words, the shell 3 may be formed from a transparent resin that hasa color but does not weaken or harm the transparency and at the sametime beautifies the appearance.

[0228] Preferably, the core 2 has a material property of which meltingpoint is higher than that of the shell 3. More specifically, it isdesirous that the melting point of the core 2 is 200° C. or more and themelting point of the shell 3 is below 150° C.

[0229] Also, the core 2 is of a material having impact-resistant, highstrength, high fluidity, high gloss and high plating-adhering strength.An example of the core material for satisfying such conditions includesNylon, PC (Polycarbonate) or the like.

[0230] Meanwhile, the shell 3 is of a material having impact-resistant,high strength, high fluidity, fire retardancy, heat-resistant,chemical-resistant, corrosion-resistant and charging-preventingproperties. In order to satisfy these conditions, the shell is of ABS,PMMA, Surlyn, ASA, ALDPHALAC or the like.

[0231] Also, character or figure may be carved or relieved on thesurface of the core 2.

[0232] In addition, the lower surface of the shell 3 is formed in aconcavo-convex structure having a dimple portion such that slip isprevented to thereby make it easy to grip the handgrip.

[0233] Further, the coupling boss 240 a, 240 b formed at both ends ofthe core 2 during the molding thereof functions to allow the handgrip 1to be screw-coupled with a door, a lid or the like.

[0234] Meanwhile, the core forming mold may be designed to be provided,at an outer side thereof when the core has been formed, with a clampingrib 200 that is clamped by a mold 40 for forming a shell, and with acoupling boss 240 a, 240 b that is coupled with a door or the like afterthe completion of the handgrip, and at the lower surface of the corewith a concaved groove 260.

[0235] Also, a gate 410 of the shell forming mold 40 is located at aposition (“B” of FIG. 30) constituting the thick leaf portion after theformation of the shell.

[0236] At this time, the gate 410 is formed preferably declined by apredetermined angle (θ) with respect to a horizontal plane, and morepreferably declined along a tangent direction drawn to pass through oneend of the gate 410 and be in contact with an upper surface of the core2.

[0237] Hereinafter, a method for fabricating a handgrip according to thefourth embodiment of the present invention is described as follows.

[0238] First, in a state that a mold (not shown) for forming a core isprepared, a melted resin having a color is injected into a cavity 400 ofthe core forming mold 6. In other words, the core is formed by aninjection molding that is a representative of plastic processing methodsand is widely used in processing plastic products having a complicatedshape.

[0239] At this time, the core forming mold 6 may be designed to beprovided, at an outer side thereof when the core has been formed, with aclamping rib 200 that is clamped by a mold for forming a shell, and acoupling boss 240 a, 240 b that is coupled with a door or the like afterthe completion of the handgrip, and with a concaved groove 260 on thelower surface of the core.

[0240] Here, in order to enable to form the coupling boss 240 a, 240 b,a groove for forming the boss is formed in a lower mold of the mold 6,and a rod-shaped rib (not shown) that after the mold 6 is removed, makesa coupling hole of the coupling boss 240 a, 240 b formed is provided ata center portion of the boss forming groove.

[0241] Meanwhile, after extracting the molded core 2, prior to loadingthe extracted core 2, a surface treatment for coloring a surface of theextracted core is carried out.

[0242] At this time, the surface treatment is carried out by covering apredetermined masking region of the core with a mask so as to define thepredetermined masking region where a colored layer should not be formed,forming the colored layer at a portion other than the masking region 500of the core 2, and removing the mask covered on the masking region 500.

[0243] Here, the colored layer formed on the surface of the core 2 is ofa colored metal layer, which is formed by a plating or a sputteringdeposition.

[0244] Meanwhile, the color surface-treated core is loaded into a shellforming mold 40 having a cavity 400 that is larger in volume than thecore 2.

[0245] A gate 410 of the shell forming mold 40 is located at a position(“B” of FIG. 30) constituting the thick leaf portion after the formationof the shell, to be declined by a predetermined angle (θ) with respectto a horizontal plane.

[0246] Especially, the gate 410 of the shell forming mold 40 ispreferably formed so as to accord with a tangent direction drawn to passthrough one end of the gate 410 and be in contact with an upper surfaceof the core 2.

[0247] Why the gate 410 is formed declined by a predetermined angle (θ)with respect to a horizontal plane is that in case the gate 410 formedby coupling the upper mold 40 a and the lower mold 40 b is a structuredirected toward the horizontal direction, as the resin is first filledin a lower space of the core 2 of the cavity 400, the pressure pushingthe core 2 upward becomes larger than the pressure pushing the coredownward, so that the core comes off and thus a deviation phenomenonfrom a fixed position may occur.

[0248] Thus, according to the fabrication method of the presentembodiment, the resin injected through the gate 410 of the shell formingmold 40 first fills an upper portion of the core 2.

[0249] In other words, the filling of the resin is first carried outwith respect to the upper side portion of the core 2, thereby preventingfailure in the appearance of the core 2 due to the coming off of thecore 2.

[0250] Meanwhile, the melted resin is injected through the gate 410 ofthe shell forming mold 40 at a high speed and a high pressure, and afterthe completion of the injection, the injected transparent resin iscooled. After the completion of the cooling, a handgrip including thecore 2 and the shell 3 covering the core 2 is extracted from the shellforming mold 4.

[0251] Thereafter, the clamping rib 200 formed on the outer surface ofthe core 2 of the extracted handgrip is removed, so that only the core 2and the shell 3 remain.

[0252] In other words, since the clamping rib 200 is formed at a lowerside of one end of the core 2, when the handgrip from which the clampingrib 200 is removed is installed in a door or the like as shown in FIG.2, a trace of the clamping rib 200 does not remain, so that appearanceof the handgrip is beautified.

[0253] Meanwhile, in the aforementioned forming step of the shell 3, dueto a lack of adhesive force between the color-treated surface of thecore 2 and the shell 3, a space may be created between the core 2 andthe shell 3. To this end, there may occur a problem in that when thehandgrip is viewed from an outside, the shape and the color formed onthe surface of the core 2 are visually distorted.

[0254] Along with this visual distortion problem, in case the adhesiveforce between the color-treated surface of the core 2 and the shell 3 isinsufficient, moisture is penetrated into a space between the core 2 andthe shell 3 during test of the handgrip products, such as theenvironment suitability test so that there may be a worry on the qualitybeing lowered.

[0255] In the above, the lack phenomenon of the adhesive force betweenthe treated surface of the core 2 and the shell 3 occurs when thetemperature of the melted resin is lowered due to a low temperature ofthe mold 40 or a contact of the core surface with moisture or foreignparticles. Especially, this non-adhesiveness phenomenon has a highoccurrence possibility at the region “C” of FIG. 32.

[0256] Accordingly, the fifth embodiment of the invention does notperform the surface treatment for coloring a predetermined region on thesurface of the core 2, thereby removing the lowering in the adhesiveforce between the surface of the core 2 and the shell 3.

[0257] In other words, since the adhesive force between the surface ofthe core 2 where the colored layer is not formed, and the shell 3 showsa superior characteristic compared with the adhesive force between thecolored layer and the shell 3, a selected region of the surface of thecore 2 is processed not to have the colored layer, so that an overalladhesive force between the core 2 and the shell 3 is increased throughthe direct adhesion of the surface of the core 2 and the shell 3,thereby preventing occurrence of a non-adhered portion.

[0258] For instance, in case the core 2 is of Nylon and the shell 3 isof Surlyn, the adhesive force therebetween is superior when they aredirectly adhered to each other. Accordingly, it is permitted not to formthe colored layer at a portion where the colored layer is not necessaryin the surface of the core 2, thereby no harming the sense of beauty onappearance and even preventing the occurrence of non-adhering portionbetween the core 2 of Nylon and the shell 3 of Surlyn.

[0259] At this time, as exemplarily shown in FIGS. 32 and 33, it isrequested that the masking region where no surface treatment for thecoloring is permitted preferably corresponds to an unexposed portion onappearance when installing the handgrip at door, lid or the like, butsuch a request is not essential. In other words, any portion other thanthe region shown in FIGS. 32 and 33, is possible if the portioncorresponds to a contact portion with the resin during the formingprocess of the shell 3.

[0260] Meanwhile, prior to loading the molded core 2 into the shellforming mold 4, the step of carving or relieving a character or figureon the surface of the formed core 2 may be further included.

[0261] Simultaneously, the shell 3 may be formed from a transparentresin that has a color but does not weaken or harm the transparency andat the same time beautifies the appearance.

[0262] Further, the core 2 applied to the fabrication method of thehandgrip according to the fifth embodiment of the present invention ismade of a material of which melting point should be 200° C. or more andthe melting point of the shell should be below 150° C.

[0263] Furthermore, the core 2 is preferably of a material havingimpact-resistant, high strength, high fluidity, high gloss and highplating-adhering strength properties, such as Nylon and PC.

[0264] Moreover, the shell 3 is of a material having impact-resistant,high strength, high fluidity, fire retardancy, heat-resistant,chemical-resistant, corrosion-resistant and charging-preventingproperties, such as ABS, PMMA, Surlyn, ASA and ALPHALAC.

[0265] Meanwhile, after forming the shell 3, in case the shell 3 is asoft material, such as Surlyn or the like, a glossy wax is coated on asurface of the shell 3 for the prevention of scratch.

[0266] In other words, according to the conventional fabrication methodof the handgrip, in case the shell 3 is a soft material such as Surlynor the like, the soft shell is soft to the touch, but a high possibilityin the occurrence of scratch exists in. 0.3

[0267] In this case, scratch may occur during the handling period of thehandgrip products before the products are surveyed to consumers, therebycausing a problem in that the reliability is lowered.

[0268] So, the handgrip fabricated according to the present embodimentfollows the step of removing a spot generated on the surface of theshell 3 due to a contact with water during the cooling process. In orderto remove this spot, the aforementioned wax is used, thereby allowingthe spot to be easily removed and simultaneously scratch to beprevented.

[0269] At this time, the glossy wax also functions to preventpenetration of moisture into the interior of the handgrip 1.

INDUSTRIAL APPLICABILITY

[0270] As described above, according to the present invention, a problemoccurring at the conventional handgrip, e.g., a problems in that coatingpeels off or relieved or carved figure or character is damaged issolved, and it becomes possible to develop the beauty on appearance ofthe handgrip differentially from the conventional one.

[0271] In other words, the handgrip fabricated by the conventionalmethod has the problems in that the coating peels off due to user'srepeated usage or is decolored, but according to the respectiveembodiments of the present invention, these problems are solved.

[0272] Also, according to the respective embodiments, the handgrip ofthe present invention makes the shell protect character or figurerelieved or carved on the core, so that an interference of the figure orcharacter with other articles is excluded and accordingly there issolved a conventional problem in that the character or figure is lostdue to the interference.

[0273] In addition, the coating surface of the conventional handgrip isweak in the contact with chemicals such as cosmetics, but the handgripsaccording to the first to fifth embodiments have the shell made oftransparent resin having superior chemistry-resistant property orchemicals-resistant property, thereby solving the contact problems.

[0274] Further, in the handgrips according to the first to fifthembodiments of the invention, since the outer shell made of transparentresin covers the inner core, it provides sense to the touch differentfrom the conventional handgrip, and particularly if the shell is made ofa colored transparent resin, it becomes possible to realize handgripshaving a variety of colors for users' preference.

[0275] Meanwhile, according to the respective embodiment of theinvention, it is possible to lower the weight of the handgrip, therebymaking it easy to handle the handgrip or door or lid to which thehandgrip is coupled. In other words, the handgrip fabricated by theconventional method has the problems in that the weight is heavy, thecoating peels off due to user's repeated usage or the coating isdecolored after the elapse of long term, but according to the first tofifth embodiment of the invention, since the core of the handgrip isformed by the blow injection or the lower surface of the core is formedin a concaved form, the handgrip is light in weight, and since the shellis made of transparent resin, a phenomenon in that the coating peels offor decolored is prevented.

[0276] In addition, according to the fifth embodiment of the presentinvention, in performing the fabrication process of the handgripincluding the colored core and the transparent shell, there are solved aphenomenon in that it takes a long time in filling the resin during theformation of the shell, a phenomenon in that resin is not completelyfilled, and a phenomenon in that a weld line is created.

[0277] In addition, according to the fifth embodiment of the presentinvention, there is solved a problem in that an adhesive force betweencore surface as treated and shell is insufficient and thus a space iscreated between the core and the shell.

[0278] Further, according to the fifth embodiment of the presentinvention, there is solved a scratch problem occurring when the handgripproducts in which the shell is a soft material, are handled.

[0279] Accordingly, the present invention can be used valuably.

[0280] While the present invention has been described and illustratedherein with reference to the preferred embodiments thereof, it will beapparent to those skilled in the art that various modifications andvariations can be made therein without departing from the spirit andscope of the invention. Thus, it is intended that the present inventioncovers the modifications and variations of this invention that comewithin the scope of the appended claims and their equivalents.

What is claimed is:
 1. A handgrip comprising: a colored core; and atransparent shell covering the core.
 2. The handgrip of claim 1, whereinsaid core is a bar type.
 3. The handgrip of claim 1, wherein said corehas a predetermined curvature along a selected direction.
 4. Thehandgrip of claim 2, wherein at least one end of both ends of said coreis a streamline shape.
 5. The handgrip of claim 2, wherein any one endof both ends of said shell is a streamline shape.
 6. The handgrip ofclaim 2, wherein at least one end of said shell is a fan shape as ittravels to both ends.
 7. The handgrip of claim 6, wherein at least oneend of both ends of said shell is the fan shape as it travels to bothends, in which a portion corresponding to both oblique sides of the fanshape is inwardly curved.
 8. The handgrip of claim 2, further comprisinga concaved portion formed on a lower surface of said core.
 9. Thehandgrip of claim 2, wherein further comprising a reinforcing ribprovided in a lower surface of said core.
 10. The handgrip of claim 2,wherein at least one end of both ends of said shell is a fan shape. 11.The handgrip of claim 2, wherein said core comprises a clamping ribformed at one end thereof, said clamping rib is, when the core is loadedinto a shell forming mold, clamped by the shell forming mold to supportthe core.
 12. The handgrip of claim 11, wherein said clamping rib isrespectively provided at both ends of said core so as to be clampedbetween an upper mold and a lower mold.
 13. The handgrip of claim 11,wherein said core has a predetermined curvature along a selecteddirection.
 14. The handgrip of claim 1, wherein said core comprises ametal layer formed on a surface thereof.
 15. The handgrip of claim 1,wherein said core is of metal.
 16. The handgrip of claim 1, wherein saidshell is transparent and colored.
 17. The handgrip of claim 1, whereinsaid core has a material property in which melting point is higher thanthat of said shell.
 18. The handgrip of claim 17, wherein the meltingpoint of said core is 200° C. or more and the melting point of saidshell is below 150° C.
 19. The handgrip of claim 1 or 18, wherein saidcore is of a material having impact-resistant, high strength, highfluidity, high gloss and high plating-adhering strength.
 20. Thehandgrip of claim 19, wherein the material of said core contains atleast one out of Nylon or PC.
 21. The handgrip of claim 1 or 18, whereinsaid shell is of a material having impact-resistant, high strength, highfluidity, fire retardancy, heat-resistant, chemical-resistant,corrosion-resistant and charging-preventing properties.
 22. The handgripof claim 21, wherein said shell comprises at least one selected from agroup consisting of ABS, PMMA, Surlyn, ASA and ALPHALAC.
 23. A methodfor fabricating a handgrip, said method comprising the steps of: moldinga core; loading said core into a shell forming mold having a cavity thatis larger in volume than said core; injecting a transparent resin intothe cavity of said shell forming mold to form a shell covering saidcore; and extracting said handgrip including said core and said shellcovering said core from said shell forming mold.
 24. The method of claim23, wherein said forming step is performed by any one of injectionmolding or blow molding.
 25. The method of claim 23 or 24, furthercomprising the step of forming a clamping rib on an outer surface ofsaid core, in which said clamping rib allows said core to be clampedbetween an upper mold and a lower mold, and supported during the step ofloading said core into the shell forming mold, after forming said core.26. The method of claim 25, further comprising the step of removing theclamping rib formed on the outer surface of the core after forming theshell.
 27. The method of claim 23, further comprising the step offorming a metal layer on a surface of the core after forming the core.28. The method of claim 27, wherein the metal layer formed on thesurface of the core is formed by a plating method.
 29. The method ofclaim 27, wherein the metal layer formed on the surface of the core isformed by a sputtering method.
 30. The method of claim 23, wherein saidcore has a material property of which melting point is higher than thatof said shell.
 31. The method of claim 30, wherein the melting point ofsaid core is 200° C. or more and the melting point of said shell isbelow 150° C.
 32. The method of claim 23 or 30, wherein said core is ofa material having impact-resistant, high strength, high fluidity, highgloss and high plating-adhering strength properties.
 33. The method ofclaim 32, wherein the material of said core contains at least one out ofNylon or PC.
 34. The method of claim 23 or 30, wherein said shell is ofa material having impact-resistant, high strength, high fluidity, fireretardancy, heat-resistant, chemical-resistant, corrosion-resistant andcharging-preventing properties.
 35. The method of claim 21, wherein saidshell comprises at least one selected from a group consisting of ABS,PMMA, Surlyn, ASA and ALPHALAC.
 36. The method of claim 23, wherein saidshell is a transparent resin having a color.
 37. The method of claim 23,further comprising the step of forming a character or a figure carved orrelieved after forming the core.
 38. A method for fabricating ahandgrip, said method comprising the steps of: injecting a colored andmelted resin into a cavity of a core forming mold for forming a core ata high speed and a high pressure, said core being provided at an outerside thereof with a clamping rib for clamping a shell forming mold;cooling the resin injected into the cavity; extracting the formed corefrom the core forming mold; loading the core extracted from the coreforming mold into the shell forming mold having a cavity that is largerin volume than the core such that the clamping rib of the core isclamped between an upper mold and a lower mold and thus the core issupported; injecting a melted and transparent resin into the cavity ofthe shell forming mold at a high speed and a high pressure to form ashell covering the core; cooling the transparent resin injected into thecavity of the shell forming mold; extracting the handgrip comprised ofthe core and the shell covering the core from the shell forming mold;and removing a clamping rib formed at the outer side of the core fromthe extracted handgrip.
 39. The method of claim 38, wherein said corehas a material property of which melting point is higher than that ofsaid shell.
 40. The method of claim 38, wherein said core is of amaterial that is higher in strength than the shell.
 41. The method ofclaim 38, wherein the transparent resin is a colored one.
 42. The methodof claim 38, further comprising the step of forming a character or afigure carved or relieved after forming the core.
 43. A handgripcomprising: a colored core having a cavity therein; and a transparentshell covering the core.
 44. The handgrip of claim 43, wherein said coreis a bar type and has a predetermined curvature along a length directionthereof.
 45. The handgrip of claim 43, wherein at least one end of bothends of said core is a streamline shape.
 46. The handgrip of claim 45,wherein at least one end of said shell is a fan shape as it travels toboth ends.
 47. The handgrip of claim 43, wherein said core comprises aclamping rib formed at one end thereof, said clamping rib is, when thecore is loaded into a shell forming mold, clamped by the shell formingmold to support the core.
 48. The handgrip of claim 47, wherein theclamping rib is provided at both ends of the core so as to be clampedbetween the upper mold and the lower mold.
 49. The handgrip of claim 47,wherein the core further comprises at a lower face of at least one endof the both ends of the core a supporting rub which is in contact withthe lower mold when the core is loaded into the mold.
 50. The handgripof claim 43, wherein said core comprises a metal layer formed on asurface thereof.
 51. The handgrip of claim 43, wherein the transparentshell is a color one.
 52. The handgrip of claim 43, wherein said corehas a material property of which melting point is higher than that ofsaid shell.
 53. The handgrip of claim 52, wherein the melting point ofsaid core is 200° C. or more and the melting point of said shell isbelow 150° C.
 54. The handgrip of claim 53, wherein said core containsat least one of Nylon and PC.
 55. The handgrip of claim 53, wherein saidshell comprises at least one selected from a group consisting of ABS,PMMA, Surlyn, ASA and ALPHALAC.
 56. A method for fabricating a handgrip,said method comprising the steps of: blow-molding a core such that thecore has a cavity therein; loading the core into a shell forming moldhaving a cavity that is larger in volume than the core; injecting atransparent resin into the cavity of the shell forming mold to form ashell covering the core; and extracting the handgrip comprised of thecore and the shell from the shell forming mold.
 57. The method of claim56, wherein the blow injecting step comprises the steps of: injecting apredetermined amount of melted resin into the cavity of a core formingmold; blowing a gas into the resin to expand the resin after thepredetermined amount of resin injecting has been completed; and coolingthe resin through a holding pressure process in which a holding pressureis applied to the gas blown into the melted resin.
 58. The method ofclaim 56, wherein said core has a material property of which meltingpoint is higher than that of said shell.
 59. The method of claim 58,wherein the melting point of said core contains at least one of Nylon orPC, and said shell comprises at least one selected from a groupconsisting of ABS, PMMA, Surlyn, ASA and ALPHALAC.
 60. The method ofclaim 56, further comprising the step of forming a metal layer on asurface of the core after forming the core.
 61. The method of claim 60,wherein the metal layer formed on the surface of the core is formed by aplating method.
 62. The method of claim 61, wherein the metal layerformed on the surface of the core is formed by a sputtering method. 63.A handgrip comprising: a colored core having a cavity therein and acoupling boss formed at both ends thereof to be directed toward a lowerdirection; and a transparent shell covering the core.
 64. The handgripof claim 63, wherein said core comprises a clamping rib formed at oneend thereof, said clamping rib is, when the core is loaded into a shellforming mold, clamped by the shell forming mold to support the core. 65.The handgrip of claim 63, wherein said core contains at least one ofNylon and PC.
 66. The handgrip of claim 63, wherein said shell comprisesat least one selected from a group consisting of ABS, PMMA, Surlyn, ASAand ALPHALAC.
 67. A method for fabricating a handgrip, said methodcomprising the steps of: blow-molding a core having a cavity therein anda coupling boss formed at both ends thereof; loading the core into ashell forming mold having a cavity that is larger in volume than thecore; injecting a transparent resin into the cavity of the shell formingmold to form a shell covering the core; and extracting the handgripcomprised of the core and the shell from the shell forming mold.
 68. Themethod of claim 56, wherein the blow-injecting step comprises the stepsof: injecting a predetermined amount of melted resin into the cavity ofa core forming mold; blowing a gas into the melted resin to expand themelted resin after the predetermined amount of resin injecting has beencompleted; and cooling the resin through a holding pressure process inwhich the holding pressure is applied to the gas blown into the meltedresin.
 69. A handgrip comprising: a colored core having a concavedgroove formed wholly along a length direction at a lower surface thereofand a coupling boss formed at both ends thereof to be directed toward alower direction; and a transparent shell covering the core.
 70. Thehandgrip of claim 69, wherein said core comprises a clamping rib formedat one end thereof, said clamping rib is, when the core is loaded into ashell forming mold, clamped by the shell forming mold to support thecore.
 71. The handgrip of claim 69, wherein said core contains at leastone of Nylon and PC.
 72. The handgrip of claim 69, wherein said shellcomprises at least one selected from a group consisting of ABS, PMMA,Surlyn, ASA and ALPHALAC.
 73. A method for fabricating a handgrip, saidmethod comprising the steps of: molding a core having a predeterminedcurvature; loading the core into a shell forming mold having a cavitythat is larger in volume than the core; and injecting a transparentresin into the cavity of the shell forming mold to form a shell coveringthe core, wherein a gate of the shell forming mold is located prior toperforming the step of forming the shell at a position forming a thickleaf portion after completion of the forming of the shell.
 75. Themethod of claim 74, wherein the gate of the shell forming mold is formeddeclined by a predetermined angle with respect to a horizontal plane.76. The method of claim 75, wherein the gate of the shell forming moldis declined along a tangent direction drawn to pass through one end ofthe gate and be in contact with an upper surface of the core.
 77. Themethod of claim 74, wherein before the molded core is loaded into theshell forming mold, the core is subject to a surface treatment forcoloring the surface of the core.
 78. The method of claim 77, whereinthe surface treatment comprises the steps of: covering a predeterminedregion of the core with a mask so as to define the predetermined regionwhere a colored layer should not be formed; forming the colored layerexcept for the predetermined region covered with the mask; and removingthe mask.
 79. The method of claim 78, wherein the colored layer is ametal layer.
 80. The method of claim 79, wherein the metal layer isformed by a plating process or a sputtering process.
 81. The method ofclaim 78, wherein the region covered with the mask corresponds to anunexposed region on appearance when the handgrip is installed in a dooror a lid and simultaneously to a region in contact with the resin duringthe molding step.
 82. The method of claim 74, if the shell is a softmaterial after forming the shell, further comprising the step of coatinga glossy wax on a surface of the shell.
 83. The method of claim 82,wherein the shell is Surlyn.
 84. The method of claim 74, wherein saidcore comprises a clamping rib formed at one end thereof, said clampingrib is, when the core is loaded into a shell forming mold, clamped bythe shell forming mold to support the core.
 85. The method of claim 74,wherein said core contains at least one of Nylon and PC.
 86. The methodof claim 74, wherein said shell comprises at least one selected from agroup consisting of ABS, PMMA, Surlyn, ASA and ALPHALAC.
 87. A methodfor fabricating a handgrip, said method comprising the steps of: moldinga colored core within a core forming mold, said core having a concavedgroove formed wholly along a length direction at a lower surface thereofand a coupling boss formed at both ends thereof to be directed toward alower direction having a cavity therein and a coupling boss formed atboth ends thereof; extracting the molded core; performing a surfacetreatment for coloring a surface of the core; loading the core into ashell forming mold having a cavity that is larger in volume than thecore such that a gate of the shell forming mold is located at a positionforming a thick leaf portion of a shell after forming the shell;injecting a transparent resin into the cavity of the shell forming moldto form a shell covering the core; and extracting the handgrip comprisedof the core and the shell from the shell forming mold.
 88. The method ofclaim 87, wherein the gate of the shell forming mold is formed declinedby a predetermined angle with respect to a horizontal plane.
 89. Themethod of claim 88, wherein the gate of the shell forming mold isdeclined along a tangent direction drawn to pass through one end of thegate and be in contact with an upper surface of the core.
 90. The methodof claim 87, wherein before the molded core is loaded into the shellforming mold, the core is subject to a surface treatment for coloringthe surface of the core.
 91. The method of claim 90, wherein the surfacetreatment comprises the steps of: covering a predetermined region of thecore with a mask so as to define the predetermined region where acolored layer should not be formed; forming the colored layer except forthe predetermined region covered with the mask; and removing the mask.92. The method of claim 90, wherein the colored layer is a metal layer.93. The method of claim 92, wherein the metal layer is formed by aplating process or a sputtering process.
 94. The method of claim 91,wherein the region covered with the mask corresponds to an unexposedregion on appearance when the handgrip is installed in a door, a lid orthe like and simultaneously to a region in contact with the resin duringthe molding step.
 95. The method of claim 87, if the shell is a softmaterial after forming the shell, further comprising the step of coatinga glossy wax on a surface of the shell.
 96. The method of claim 95,wherein the shell is Surlyn.
 97. The method of claim 87, wherein saidcore contains at least one of Nylon and PC.
 98. The method of claim 87,wherein said shell comprises at least one selected from a groupconsisting of ABS, PMMA, Surlyn, ASA and ALPHALAC.
 99. A method forfabricating a handgrip, said method comprising the steps of: molding acolored core within a core forming mold, said core having a concavedgroove formed wholly along a length direction at a lower surface thereofand a coupling boss formed at both ends thereof to be directed toward alower direction having a cavity therein and a coupling boss formed atboth ends thereof; extracting the molded core; covering a predeterminedsurface region of the core with a mask so as to define the predeterminedsurface region where a colored layer should not be formed; forming thecolored layer except for the predetermined surface region covered withthe mask; and removing the mask performing a surface treatment forcoloring a surface of the core; loading the core into a shell formingmold having a cavity that is larger in volume than the core such that agate of the shell forming mold is located at a position forming a thickleaf portion of a shell after forming the shell; injecting a transparentresin into the cavity of the shell forming mold to form a shell coveringthe core; and extracting the handgrip comprised of the core and theshell from the shell forming mold.